Gas-furnace.



PATENTED APR. 11, 1905.

J. G. SWINDELL.

GAS FURNACE.

APPLICATION FILED APR.4,190'4.

3 SHEETS-8HBET 1.

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FIG.2.

WITNESSES (ya/m No.78'7,131. PATENTED APR.11, 1905. J. C. SWINDBLL.

GAS FURNACE.

APPLICATION FILED APR. 4, 1904 3 SHEBTSSHEET 2.

10 Fig.3.

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WITNESSES PATENTBD APR. 11, 1905.

J. O. SWINDBLL.

GAS FURNACE.

APPLICATION FILED APR. 4. 1904.

3 SHEETSSHEET 3 w a. m r w W Q0 M M J W m a 7, a m m m M 7 M F 1m F F@ W M 9 m a y m J J ///AV Gas WITNESSES Patented Aplll. 11, 1905.

EETcE,

JOHN C. S\VINDELL, OF i-XLLEGIIENY, IEYXQYLYAR'IA.

GAS-FURNACE.

SPECIFICATION forming part of Letters Patent No. 787,131, dated April 11, 1905.

Application filed Apri14,1904. Serial No. 201,484.

To wh /m1 [f IIII/f/ concern:

l e it known that I, Join: C. SWINDELL, of Allegheny, in the county of Allegheny and State of Pennsylvania, have invented a certain new and useful Improvement in(ras-Furnaces, of which improvement the following is a specilication. I

My invention relates to furnaces which are heated by gaseous fuel; and its object is to provide means whereby the waste gases evolved from the combustion of the fuel may be utilized in thoroughly and highly heating the air supplied for etlecting combustion, such means 1 being of eompactand comparatively inexpeni sive construction and adapted for application in connection with gas-furnaces of various ltnown types without necessitating modilication of their essential structural and operative conditions.

i l l The improvement claimed is hereinafteri and g respectively. of Fig. 2').

in the instance herein exemplitied my inl vention is shown as applied in connection with 1 a mutile-furnace: but it is not to be understood as being limited to that or any other specilie type of furnace.

In the practice of my invention a closed furnace-chamber l. which is of form and dimensions proper to receive the material to be heated and is constructed of suitable refractory material, is built above a combustioni-hamber 2. to which gaseous fuel is supplied from a conduit 3. leading from a gas producer or main and controlled by a valve r.

passes therefrom into a gas-channel 5,which extends longitudinally beneath the combustion-chamber 2 and communicates therewith i by ports a in the arched top of the gas-chan- T nel. Air for etfccting the combustion of the The gas which is admitted by the opening of the valve gas is supplied through channels 7, which are controlled by end doors or valves 7 and extend longitudinally on opposite sides of the gas-channel and coml ustion-chamber 2 and communicate with the latter by ports 9 near the tops of its side walls. The channels'i' are divided by horizontal walls T", extending from their inlet ends nearly to their opposite ends, into upper and lower sections, through which the air passes successively in opposite directions. Air is also supplied to the combustion-chamber through channels ll), which oxtend vertically at opposite sides of the furnace and are curved or arched across its top, said channels communicating with the combustion-chainber on one side thereof by ports 11. The products of combustion or waste gases pass out of the top of the combustionchamber into channels 12, which surround the top, sides, and bottom of the 't'urnace-chambcr '1, from the tops of which channels they pass into the arched upper ends of vertical channels 13 at the sides of the furnace and down the same into horizontal channels ll, which are divided into upper and lower sections by horizontal walls l5, extending from the front of the channels 14: nearly to their ends. The waste gases pass lirst rearwardly and thence forwardly through said channels an'l thence into an outlet or discharge flue or channel 16.

The essential and characteristic feature of my present invention consists in the novel combination and relative disposition of the furnace-chamber and the channels by which itis surrouiuled on its top and sides and which adjoin the combustion-chamber, whereby the incoming air is subjected as thoroughly as practicable to the heat imparted to the walls of the combustion-cllaml er and of that of the outgoing waste gases or products of combustion and is thereby highly heated prior to its admixture with the gas by the utilization of heat. the most part of which would otherwise be discharged into the atmosphere without useful effect. Referring to the drawings, it will be seen that the lower horizontal airchannels 7 are each interposed between the central combustion-chamber 2 and one of the lateral horizontal wastegas channels 1+t. Also each of the vertical air-channels ll) adjoins one of the vertical waste-gas channels 13, and each of said channels 10, except that at the front of the furnace,is interposed between two of the channels 13. The upper curved portions of the air-channels 1O adjoin and are further heated by the correspondingly-curved upper connection of the waste-gas channels 12. By the employment of suitable valves or dampers controlling the air or the waste channels, or both, in the ordinary manner the incoming air may be subjected to a greater or less degree of heat, as desired. It will thus be seen that provision is made for very complete utilization of the heat of the waste gases. and the relative disposition of the combustion and furnace chambers and the surrounding air and gas channels is such that the entire furnace is of simple construction and is inclosed within substantially rectangular boundaries which do not materially increase the volume required for the furnace and combustion chambers.

I claim as my invention and desire to secure by Letters Patent- 1. In a gas-furnace, the combination of a furnace chamber, a subjacent combustionchamber, a waste-gas channel, one or more. leading out of the combustion-chamber and extending down wardl y, a horizontal waste-gas channel located below and communicating with said downwardly-extending channel, a longitudinal partition-Wall dividing said horizontal waste-gas channel into sections or compartments which communicate at the end of said channel farther from its discharge, and a horizontal air-supply channel adjoining said horizontal waste-gas channel and communieating by a delivery-port with the combustion-chamber.

2. In a gas-furnace, the combination of a furnace chamber, a subjacent combustionchamber, a waste-gas channel, one or more, leading out of the combustion-chamber and extending downwardly, a horizontal Waste-gas channel located below and communicating with said downwardly-extending channel, a horizontal air-supply channel interposed between said horizontal waste-gas channel and the combustion-chamber and communicating by a delivery-port with the combustion-chamber, and a longitudinal partition-wall dividing said airsupply channel into sections or compartments which communicate at the end of said channel farther from its supply-opening.

3. In a gas-furnace, the combination of a furnace chamber, a subjacent combustionchamber, waste-gas channels, adjoining the bottom, sides, and top of the furnace-chamber, lateral downwardly-extending waste-gas channels communicating with said first-named waste-gas channels, air-supply channels each adjoining one of said last-named waste-gas channels and leading into the combustionchamber, horizontal waste-gas channels communicating with said last-named waste-gas channels, and air-supply channels interposed between said last-named waste-gas channels and the combustion-chamber, and leading into said combustion-chamber.

JOHN C. SW'INDELL.

Witnesses:

J. SNoWDEN BELL, CLARENCE A. WILLIAMS. 

